4 ms·
Too many get caught up in the "USB-C" connector, and forget about the modes and power delivery. That said, AFAICT the May 2022 revision states (pg 6): "the dev
by davoneus 4y ago
Too many get caught up in the "USB-C" connector, and forget about the modes and power delivery. That said, AFAICT the May 2022 revision states (pg 6):
"the devices should incorporate the USB Power Delivery (USB PD) standard (as described in the European standard EN IEC 62680-1-2:2021) and ensure that any additional charging protocols allow for full USB PD functionality (new annex Ia, part I)."
Then the referenced: "EN IEC 62680-1-2:2021" standard specifies
"To facilitate optimum charging, the specification defines two mechanisms a USB Charger can advertise for the Device to use:
1. A list of fixed voltages each with a maximum current.
2. A list of programmable voltage ranges each with a maximum current (PPS). The Device requests a voltage (in 20 mV increments) that is within the advertised range and a maximum current."
But those regs get over my head quickly, so someone else may have better luck interpreting them.
- criddell 4y agoThis brings up an issue that Carl Malamud at public.resource.org has been fighting. The EU directive references a standard that costs $300 if you want a copy. You shouldn't have to pay to know your laws. If the EU is going to reference a standard owned by somebody else, they should purchase a license that allows them to publicly post the entire standard (AFAIK, they haven't done that). Or they could pass laws that say any standards referenced by law lose their copyright status. This would be a type of eminent domain for intellectual property.